US4580313A - Walk behind floor maintenance machine - Google Patents

Walk behind floor maintenance machine Download PDF

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Publication number
US4580313A
US4580313A US06/531,456 US53145683A US4580313A US 4580313 A US4580313 A US 4580313A US 53145683 A US53145683 A US 53145683A US 4580313 A US4580313 A US 4580313A
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US
United States
Prior art keywords
hopper
frame
filter housing
filter
debris
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/531,456
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English (en)
Inventor
Michael L. Blehert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cooper Industries LLC
Tennant Co
Original Assignee
Tennant Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24117715&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US4580313(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Assigned to TENNANT COMPANY, A MN CORP. reassignment TENNANT COMPANY, A MN CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BLEHERT, MICHAEL L.
Priority to US06/531,456 priority Critical patent/US4580313A/en
Application filed by Tennant Co filed Critical Tennant Co
Priority to JP58216388A priority patent/JPS6062310A/ja
Priority to AT84109836T priority patent/ATE34655T1/de
Priority to DE8484109836T priority patent/DE3471581D1/de
Priority to EP84109836A priority patent/EP0135787B2/en
Priority to CA000461691A priority patent/CA1244610A/en
Priority to AU32459/84A priority patent/AU561516B2/en
Priority to BR8404540A priority patent/BR8404540A/pt
Publication of US4580313A publication Critical patent/US4580313A/en
Application granted granted Critical
Assigned to COOPER INDUSTRIES, INC. reassignment COOPER INDUSTRIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PB BOP, INC.
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4027—Filtering or separating contaminants or debris
    • A47L11/4033—Means for cleaning filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/24—Floor-sweeping machines, motor-driven
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4013—Contaminants collecting devices, i.e. hoppers, tanks or the like
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4013—Contaminants collecting devices, i.e. hoppers, tanks or the like
    • A47L11/4025—Means for emptying

Definitions

  • the present invention relates to surface maintenance equipment and more particularly to walk behind surface maintenance equipment utilizing a fan for drawing a vacuum airstream through such equipment.
  • the present invention further relates to such equipment including a filter for removing dust from such stream prior to passage through the fan.
  • a wide variety of machines have been available in the past for use in maintenance of surfaces such as floors, parking lots, and the like. Such maintenance machines include self-propelled riding machines as well as self-propelled walk behind machines. Typically, both types of machines have utilized fans or pumps to draw a vacuum in the brush housing thereby minimizing dusting around the brush housing. Filters have generally been provided to minimize the amount of dust that passes through the fan. In the absence of such filters, the dust causes unnecessary wear and degradation of the fan and pollutes the atmosphere. A long-standing problem has been the accumulation of dust on the filter. This tends to block the filter and create a substantial pressure differential between the upstream side of the filter and the downstream side of the filter, thus reducing the efficiency of the equipment. A manual or mechanical system is generally incorporated to clean the filter at regular intervals to enable the machine to continue to function without frequent replacement of the filter.
  • Walk behind units desirably are of a small size and thus large powered hopper dumping elements have not been provided.
  • Some walk behind units have included a hopper that may be manually lifted by the operator, carried to a suitable location and dumped.
  • Such units in the past have, of necessity, spaced the filter from the hopper to permit removal of the hopper. Such spacing, of course, does not provide for a minimized size of unit. Further, such spacing does not provide for return of the dust from the filter to the hopper. Instead, such units have generally included a secondary hopper or drawer into which accumulated dust is dropped.
  • the present invention provides a walk behind, power driven floor maintenance machine including a hopper, a cylindrical driven brush for moving soilage into the hopper, a vacuum fan for drawing an airstream through the hopper and a filter for removing dust particles from the airstream before exhausting to the atmosphere.
  • the present machine has a filter disposed in a filter housing.
  • the filter housing is box-like in shape and is disposed immediately above the hopper.
  • the filter housing is sloped downwardly and forwardly to communicate at its forward end with the hopper.
  • the filter housing is hingedly secured at its upper end to the body of the floor maintenance machine and is freely but sealingly engaged at its lower end with the hopper.
  • the filter housing may be vibrated to shake collected dust from the filter and to convey such dust along the sloped lower wall of the housing into the hopper.
  • the lower wall serves as a vibratory conveyor.
  • the filter housing may be pivoted upwardly out of the way when one desires to remove the hopper such as for dumping.
  • FIG. I is a perspective view from the left front of the present invention.
  • FIG. II is a side elevational view of the embodiment of FIG. I;
  • FIG. III is a perspective view of the present invention with the filter housing pivoted to its uppermost position;
  • FIG. IV shows a lower front portion of the invention including a hopper support member
  • FIGS. V and VI show the upper side supports of the hopper
  • FIG. VII shows the present invention with the filter housing pivoted to its uppermost position and the hopper lifted out of its supported position
  • FIG. VIII shows the present invention with the hopper pivoted to a dumping position
  • FIG. IX shows a side view of the present invention with housing portions removed to expose underlying structure
  • FIG. X is an exploded view of the filter assembly on the present floor maintenance machine.
  • FIG. XI is a cross sectional view of the filter assembly.
  • FIG. XII is a schematic view of an alternate embodiment.
  • the present invention as illustrated in FIGS. I-XI relates to surface maintenance equipment and more specifically to equipment commonly referred to as sweepers.
  • the sweeper 10 includes a body portion 11 supported on a plurality of wheels 12.
  • the body 11 has controls such as the steering bar 13 and shifting lever 14.
  • a side brush 16 may be disposed at the forward portion of sweeper 10.
  • the sweeper 10 of course includes a housing which overlies the internal structural portions of the machine.
  • the present machine 10 has a rotatably driven cylindrical brush 17 which may be encased within a suitable dust housing 18 which minimizes dusting around the machine.
  • the present invention is illustrated in FIG. III with various housing portions removed to disclose the underlying structure, including hopper 19 and filter housing 21.
  • the hopper includes a bottom wall 22, a pair of sidewalls 23 and 24, an upper wall 26 and a front wall 27.
  • the bottom wall 22 may include a ramp 28, for example, of a resilient elastomeric material.
  • the hopper 19 may be partially enclosed to the rear by wall 25 thus providing an opening 31 for receipt of swept material.
  • the upper wall 26 has a rectangular opening 32 therein for purposes hereinafter described.
  • a pair of upwardly extending arms 33 and 34 may be mounted on the upper wall 26.
  • the arms 33 and 34 are mirror images of each other; however, otherwise they may be identical in structure.
  • Arm 33 may include an upwardly extending portion 33a and a rearwardly extending portion 33b. Portion 33b has an outwardly extending stub shaft 36 which assists in supporting the hopper with respect to the body 11. Arm 34 is similarly constructed.
  • a pair of L-shaped bars 37 and 38 serve as suitable handles for lifting and carrying the hopper 19.
  • Bar 37 for example, may be welded at one end to upper wall 26 and secured by a bolt 39 at the other end.
  • the hopper 19 has a lever and grip 41 rotatably secured at one end to the bar 37.
  • the lever and grip 41 may be of a length slightly less than the width of the hopper 19 to permit stowing.
  • the lever 41 may be rotated from the position shown in FIG. VII to the position shown in FIG. VIII.
  • a small angle member or lock 42 secures handle 41 when rotated to the position shown in FIG. VIII.
  • the hopper sidewalls 23 and 24 each have an outwardly extending stub shaft 43.
  • the stub shafts 36 and 43 serve to support the hopper 19 with respect to the body 11.
  • the stub shaft 36 is located rearwardly of the center of mass of hopper 19 whereas the stub shaft 43 is located slightly forwardly of the center mass.
  • the body 11 has a forwardly extending arm 44 adjacent each side for supporting engagement with the stub shaft 43.
  • the arm 44 as illustrated in FIG. X may have an upwardly facing recess in which the stub shaft 43 is held.
  • the body 11 (FIGS. V and VI) has a pair of side members 46, one on either side, on which is located a channel-like support 45 for reception of the stub shaft 36.
  • the filter assembly 21 as illustrated in FIGS. III, VII and IX, includes a housing 47 having a lower portion 48 and cover 59. Housing 47 is supported with respect to the body 11 by hinges 49 (FIG. VII) and by stop 50. A panel filter 51 (FIG. X) is supported in the housing 47 and sealed with respect to such housing such that any air passing through the housing 47 must pass through the filter. The filter thus divides the housing into a dusty air zone beneath the filter and a clean air zone above the filter.
  • the housing 47 (FIGS. VII, VIII and X) has an inlet 52 with a suitable resilient seal 53 therearound. The inlet 52 mates with hopper opening 32 to receive air from the hopper.
  • the housing 47 (FIGS.
  • III and X further includes an outlet 54 which communicates with a vacuum fan 56.
  • the outlet 54 may include a short tube 57 which slides into a rubber boot 58 when the filter housing is in the lowered operating position, and yet slips out of such boot when the housing is raised, as illustrated in FIG. III.
  • the filter housing 47 has a cover portion 59 which may be removed by the removal of screws 61 (FIGS. VII and X) from the threaded openings 62 in the housing support brackets 63. Panel filter 51 may be then lifted out and removed.
  • the present invention is illustrated using a panel filter however other types of filters may be used such as bag filters, canister filters and the like.
  • the tube 57 and boot 58 may be replaced with an accordion-type tube which is secured at one end to a fan duct and secured at the other end to the filter housing 47.
  • an electrically powered eccentric weight device 64 is provided to vibrate the entire housing 47 and panel filter 51. Since the device 64 is located outside the filter housing 47 it is protected from the abrasive, dusty environment of such housing and thus has an extended life. In the absence of such a vibrating device, the housing and filter may be vibrated by merely striking the housing with one's fist to dislodge dust from the filter. The lower wall 48a of housing 47 may slope downwardly and may act as a vibratory conveyor to move the dislodged dust to the hopper.
  • the present invention has many aspects which are common to most walk behind sweepers and further has aspects and advantages which are totally new.
  • the present sweeper is powered by any suitable power source, such as an electric motor or a gasoline powered engine.
  • the power source drives the wheels 12 and the brushes 16 and 17.
  • the brush 16 serves to sweep dirt and debris from the side of the sweeper path into the center portion where the main brush 17 picks up the dirt and debris, sweeping it into the hopper 19.
  • the dirt and debris enters the hopper opening 31 and generally is retained therein.
  • a vacuum fan 56 serves to draw an airstream through the hopper 19 moving light debris forwardly.
  • the filter assembly 21 serves to remove dust-laden air from the airstream, thus protecting the fan motor 56 from abrasion.
  • the panel filter 51 serves to trap such dust.
  • the filter assembly 21 engages at its lower end the hopper 19 with the opening 52 of assembly 2 communicating with the opening 32 of hopper 19.
  • the weight of the filter assembly 21 is supported on stop 50.
  • the resilient seal 53 prevents entrance of ambient air, thus requiring all airstream to pass through the hopper.
  • the lower wall of the filter housing 47 is also vibrated and the dust slides therealong to drop into the hopper 19. If one wishes to replace the panel filter 51, screws 61 are removed and the cover 59 is removed providing access to such filter.
  • the filter assembly 21 When the operator desires to empty the hopper 19 of collected dirt and debris, the filter assembly 21 is pivoted upwardly as shown in FIG. III. To facilitate this operation, an air spring 60 may be provided to counterbalance the weight of such assembly. Alternatively, suitable releasable bracing may be provided. The operator may grasp the handles 37 and 38 and lift the hopper 19 from its position on sweeper 10. The hopper may be carried to a suitable dump area and emptied. Alternatively, if the operator merely wishes to dump the hopper 19 at the location of the sweeper 10, the handle 41 may be pivoted to the position shown in FIG. IV and the hopper elevated to the position shown in FIG. VIII with the hopper pivoting on the stub shaft 36.
  • the pair of stub shaft supports 43 at each side of hopper 19 permit the hopper to rock over obstacles. For example, as an obstacle such as a can or brick moves beneath the rear portion of hopper 19 and resilient lip 28, the hopper 19 may pivot upwardly resting on shafts 43.
  • sweeper 110 An alternate embodiment of the present invention, sweeper 110, is illustrated in FIG. XII.
  • Sweeper 110 may be identical in structure except that sweeper 110 includes a power dump for the hopper 119.
  • the power dump may be an electrically driven screw 141 which is mounted on sweeper body 111.
  • the screw 141 acts to rotate hopper 119 in a clockwise direction as viewed in FIG. XII to an elevated dump position.
  • the upper stub shafts 136 may be locked in channel 145 by a solenoid 146 but only during the dumping operation.
  • the sweeper 110 of course has suitable controls for activating the solenoid 146 and the screw 141 for dumping.
  • the sweeper 110 may include a lockout mechanism which prevents activation of screw 141 unless the operator has first raised the filter housing 121. The operator may, if desired, manually lift and carry the hopper 119 to a dump site.

Landscapes

  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Catching Or Destruction (AREA)
  • Soil Working Implements (AREA)
  • Harvester Elements (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Floor Finish (AREA)
US06/531,456 1983-09-12 1983-09-12 Walk behind floor maintenance machine Expired - Fee Related US4580313A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US06/531,456 US4580313A (en) 1983-09-12 1983-09-12 Walk behind floor maintenance machine
JP58216388A JPS6062310A (ja) 1983-09-12 1983-11-18 床保守機械
AT84109836T ATE34655T1 (de) 1983-09-12 1984-08-17 Von hinten lenkbare kehrmaschine.
EP84109836A EP0135787B2 (en) 1983-09-12 1984-08-17 Walk behind floor maintenance machine
DE8484109836T DE3471581D1 (en) 1983-09-12 1984-08-17 Walk behind floor maintenance machine
CA000461691A CA1244610A (en) 1983-09-12 1984-08-23 Walk behind floor maintenance machine
AU32459/84A AU561516B2 (en) 1983-09-12 1984-08-28 Floor sweeping machine
BR8404540A BR8404540A (pt) 1983-09-12 1984-09-11 Maquina de manutencao de pisos aparelhos e maquina de manutencao de superficie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/531,456 US4580313A (en) 1983-09-12 1983-09-12 Walk behind floor maintenance machine

Publications (1)

Publication Number Publication Date
US4580313A true US4580313A (en) 1986-04-08

Family

ID=24117715

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/531,456 Expired - Fee Related US4580313A (en) 1983-09-12 1983-09-12 Walk behind floor maintenance machine

Country Status (8)

Country Link
US (1) US4580313A (pt)
EP (1) EP0135787B2 (pt)
JP (1) JPS6062310A (pt)
AT (1) ATE34655T1 (pt)
AU (1) AU561516B2 (pt)
BR (1) BR8404540A (pt)
CA (1) CA1244610A (pt)
DE (1) DE3471581D1 (pt)

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US4716621A (en) * 1985-07-26 1988-01-05 Dulevo S.P.A. Floor and bounded surface sweeper machine
US4819676A (en) * 1986-01-16 1989-04-11 Tennant Company Combination sweeping and scrubbing system and method
EP0320526A1 (de) * 1987-12-16 1989-06-21 Hako-Werke GMBH & Co. Handgeführte Kehrmaschine
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US20030019071A1 (en) * 2001-07-30 2003-01-30 Field Bruce F Cleaner cartridge
US20040040102A1 (en) * 2001-07-30 2004-03-04 Tennant Company Foamed cleaning liquid dispensing system
US20040221407A1 (en) * 2001-07-30 2004-11-11 Tennant Company Cleaning liquid dispensing system
US20050022844A1 (en) * 2003-07-30 2005-02-03 Tennant Company Ultraviolet sanitation device
US20060137127A1 (en) * 2001-07-30 2006-06-29 Field Bruce F Cleaning system utilizing purified water
US20060150352A1 (en) * 2003-09-02 2006-07-13 Tennant Company Hard and soft floor cleaning tool and machine
US20060236494A1 (en) * 2005-04-07 2006-10-26 Tennant Company Hard and soft floor surface cleaner
US20060282975A1 (en) * 2005-05-05 2006-12-21 Tennant Company Floor sweeping and scrubbing machine
US7199711B2 (en) 2004-11-12 2007-04-03 Tennant Company Mobile floor cleaner data communication
US20070089251A1 (en) * 2005-10-21 2007-04-26 Tennant Company Floor cleaner scrub head having a movable disc scrub member
US20070180645A1 (en) * 2001-07-30 2007-08-09 Tennant Company Cleaning liquid dispensing in a mobile hard surface cleaner
US20080276412A1 (en) * 2007-03-06 2008-11-13 Kurt Clarence Adelman External Filter Chamber
USD654234S1 (en) 2010-12-08 2012-02-14 Karcher North America, Inc. Vacuum bag
US8887340B2 (en) 2003-05-14 2014-11-18 Kärcher North America, Inc. Floor cleaning apparatus
US9015887B1 (en) 2003-05-14 2015-04-28 Kärcher North America, Inc. Floor treatment apparatus
US20150135475A1 (en) * 2013-11-15 2015-05-21 Nilfisk-Advance A/S Vacuum cleaner with hinged flap
US9038236B2 (en) 2012-04-25 2015-05-26 Shop Vac Corporation Filter shaker
US20170326489A1 (en) * 2016-05-16 2017-11-16 Bitfury Group Limited Filter for immersion cooling apparatus
US10010230B2 (en) 2014-03-24 2018-07-03 International Cleaning Equipment Holdings Co., Ltd. Riding floor cleaning machines having intelligent systems, associated sub-assemblies incorporating intelligent systems, and associated methods of use
WO2020084092A1 (fr) * 2018-10-25 2020-04-30 Etablissements Emily Balayeuse pourvue d'un dispositif de decolmatage de son filtre a air
USD907868S1 (en) 2019-01-24 2021-01-12 Karcher North America, Inc. Floor cleaner
US11051670B2 (en) 2017-04-13 2021-07-06 Intelligent Cleaning Equipment Holdings Co. Ltd. Floor cleaning machines having intelligent systems, associated sub-assemblies incorporating intelligent systems, and associated methods of use
US20230054083A1 (en) * 2021-07-16 2023-02-23 Etablissements Emily Industrial sweeper provided with an improved device for unclogging the air filter thereof
US12070181B2 (en) 2017-05-04 2024-08-27 Alfred Kärcher SE & Co. KG Floor cleaning appliance and method for cleaning a floor surface
US12075957B2 (en) 2014-03-24 2024-09-03 Intelligent Cleaning Equipment Holdings Co. Ltd. Floor cleaning machines having intelligent systems, associated sub-assemblies incorporating intelligent systems, and associated methods of use

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DE10324826A1 (de) * 2003-05-30 2004-12-16 Hako-Werke Gmbh Bodenreinigungsmaschine
WO2009110916A1 (en) 2008-03-06 2009-09-11 Tennant Company External filter chamber and shaking apparatus
EP3189760A1 (de) * 2016-01-08 2017-07-12 Wetrok AG Bodenreinigungsmaschine
CN113786126B (zh) * 2021-08-23 2022-09-09 曲靖市兄弟实业有限公司 一种建筑施工除尘保护系统

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Brochure entitled Clarke Space Sweeper . *
Brochure entitled Staubfreie Innenund AuBenreinigung Problem Gelost Mit Der Kehrsaugmaschine Hako Hamster , Hako. *
Brochure entitled The Self Propelled Battery Retriever 360 B. One Easy Way to End Tough Litter Problems , Industrial Division, Advance Floor Machine Company, Spring Park, Minn. *
Brochure entitled Wayne Industrial Sweepers, Model 836 , FMC Corporation, Municipal & Industrial Service Equipment Division, Pomona, Calif. *
Brochure entitled Wayne Starsweep Series/500 Walker Type Power Sweepers, See Them Try Them Compare Them , Wayne Manufacturing Co., Chicago, Ill. *
Brouchure entitled "Tennant 220 Power Sweeper", Tennant Company, Minneapolis, Minn.
Brouchure entitled Tennant 220 Power Sweeper , Tennant Company, Minneapolis, Minn. *

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Also Published As

Publication number Publication date
EP0135787A2 (en) 1985-04-03
EP0135787A3 (en) 1985-12-04
DE3471581D1 (en) 1988-07-07
EP0135787B2 (en) 1993-03-24
AU3245984A (en) 1985-03-21
JPH0373291B2 (pt) 1991-11-21
AU561516B2 (en) 1987-05-07
EP0135787B1 (en) 1988-06-01
CA1244610A (en) 1988-11-15
JPS6062310A (ja) 1985-04-10
BR8404540A (pt) 1985-04-09
ATE34655T1 (de) 1988-06-15

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